<template>
  <div class="star" :class="starType">
    <span v-for=" itemClass in itemClasses" :class="itemClass" class="star-item" track-by></span>
  </div>
</template>

<script>
  const LENGTH = 5;
  const CLS_ON = 'on';
  const CLS_HALF = 'half';
  const CLS_OFF = 'off';
export default {
  props:{
      size: {
        type: Number
      },
      score: {
        type: Number
      }
  },
  computed: {
    starType() {
      return 'star-'+this.size;
    },
    itemClasses () {
      let result = [];
      let score = Math.floor( this.score * 2) / 2;
      let hasDecimal = score % 1 !== 0;
      let integer = Math.floor(score);
      for (let i = 0; i < integer; i++) {
        result.push(CLS_ON);
      }
      if (hasDecimal) {
        result.push(CLS_HALF);
      }
      while(result.length <  LENGTH) {
        result.push(CLS_OFF);
      }
      return result;
    }
  }
}
</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->
<style lang="scss" scoped>
  @import '../../common/scss/mixin.scss';
  .star {
    .star-item {
      display: inline-block;
      background-repeat: no-repeat;
      background-size: 100% 100%;
    }
    &.star-48 {
      .star-item {
        width: 20px;
        height: 20px;
        margin-right: 22px;
        &:last-child {
          margin-right: 0;
        }
        &.on {
          @include bg-image('star48_on')
        }
        &.half {
          @include bg-image('star48_half')
        }
        &.off {
          @include bg-image('star48_off')
        }
      }
    }
    &.star-36 {
      .star-item {
        width: 15px;
        height: 15px;
        margin-right: 6px;
        &:last-child {
          margin-right: 0;
        }
        &.on {
          @include bg-image('star36_on')
        }
        &.half {
          @include bg-image('star36_half')
        }
        &.off {
          @include bg-image('star36_off')
        }
      }
    }
    &.star-24 {
      .star-item {
        width: 10px;
        height: 10px;
        margin-right: 3px;
        &:last-child {
          margin-right: 0;
        }
        &.on {
          @include bg-image('star24_on')
        }
        &.half {
          @include bg-image('star24_half')
        }
        &.off {
          @include bg-image('star24_off')
        }
      }
    }
  }
</style>